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GENUS   Anthidiellum

Author: Cockerell, 1904

Type species: Trachusa strigata Panzer, 1805, by original designation.
Clade: Anthophila
Family: Megachilidae
SubF: Megachilinae
Tribe: Anthidiini
Estimated min and max body length from the genus.
Countries with known records of the genus (based on Nieto et al. 2014).
Estimated difficulty to accurately identify a specimen as belonging to this genus.
Distinctive traits
  • black and yellow or light brown cuticle
  • 2 submarginal cells
  • 2nd recurrent vein reaching beyond submarginal cell 2.
  • females with ventral scopa
  • presence of arolium
  • scutellum extended posteriorly with angled sides
  • male tergite 7 without a spine
Pictures of distinctive traits.
Morphologically close genera and how to distinguish them
  • Anthidiellum - Afranthidium, Anthidium, Icteranthidium & Pseudoanthidium
Anthidiellum species do have an arolium between their claws.
Afranthidium, Anthidium, Icteranthidium & Pseudoanthidium species don't have an arolium between their claws.
  • Anthidiellum - Eoanthidium, Rhodanthidium & Trachusa
Anthidiellum species have a subrectangular, posteriorly extended scutellum and are much smaller.
Eoanthidium, Rhodanthidium & Trachusa species have a rounded scutellum and are larger.
  • Anthidiellum - Stelis
Anthidiellum species have rounded axillae, males have one apical tooth (sometimes bifid) on their anterior and median tibiae and females have a ventral scopa.
Stelis species may have pointed axillae, males have two widely separated apical teeth on their anterior and median tibiae and females have no ventral scopa
General comments on Anthidiellum species identification
According to Warncke, European species can be distinguished on the teeth and spines on sternites, as well as on the shape of the anterior border of the mesopleuron:
A. strigatum: wave-like anterior margin of the mesopleuron, S6 of males with a spine, last segment rounded in females.
A. breviusculum: straight anterior margin of the mesopleuron, S6 of males rounded, last segment with fine teeth.
SPECIES IDENTIFICATION TOOL
Sorry, but the species identification tool is not yet available for Anthidiellum. 
Please check the reference(s) below for traditional keys.

List of the 2 Anthidiellum species found in Europe (IUCN 2014 + Rasmont et al 2017):
Anthidiellum (Anthidiellum) breviusculum (Pérez, 1890)
Anthidiellum (Anthidiellum) strigatum (Panzer, 1805)
References with identification keys for some of the species:
  • Warncke, K. 1980. Die Bienengattung Anthidium Fabricius, 1804 in der Westpaläarktis und im turkestanischen Becken. Entomofauna 1(10): 119-210.
Online resources:
Exotic Bee ID (World)
Atlas hymenoptera (Belgium)
Discover Life (World)
WestPalBees (West Palearctic)
Page contributors:
  • Adrien Perrard (Dec. 2019)

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References used to write this page:
  • Michener, C.D. 2007. The Bees of the World, 2nd Edition. The John Hopkins University Press, Baltimore.
  • Michez D., Rasmont P., Terzo, M., Vereecken, N. 2019. Abeilles d'Europes. Hymenoptères d'Europes, Volume 1. N.A.P. Editions.
  • Nieto, A., Roberts, S. P., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., ... & Michez, D. 2014. European red list of bees. Luxembourg: Publication Office of the European Union, 98.
  •  Rasmont, P., Devalez, Jelle, Pauly, A., Michez, D. & Radchenko, V.G. 2017. Addition to the checklist of IUCN European wild bees (Hymenoptera: Apoidea). Annales de la Société entomologique de France 53: 17-32.
  • Warncke, K. 1980. Die Bienengattung Anthidium Fabricius, 1804 in der Westpaläarktis und im turkestanischen Becken. Entomofauna 1(10): 119-210.

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